Radiator core



J. ML EEEEE Rs 1,717,348

RADIATOR CORE J. M. FEDDERs RADIATOR CORE June` l1, 1929.

s shee'tS-snet Filed Jan. 25, 1928 June 1l, 1929. J. M. FEDDERS RADIATORCORE Filed Jan. 25, 1928 5 Sheets-Sheet 3 Patented June 11, 1929.vUNITED STATES JOHN H. FEDDERS, OF BUFFALO,

'i 1,717,348 PATENT OFFICE.

NEW YORK, ASSIGNOR T FEDDEBS MANUFACTUR- ING GOMPANYNC., OF BUFFALO, NEWYORK, A CORPORATION OF NEW YORK.

RADIATOR CORE.

Application led January 25, 1928. Seriallo. 249,244.

This invention relates to a core which is more particularly intended foruse as part of a radiator for cooling the water of gas engines althoughthe same may also be used for other purposes.

One of the objects of this invention 1s to produce a radiator core inwhich a minimum amount of double metal is used and instead a maximumamount of single thickness of metal is exposed to the atmosphere andthereby increase the radiating eiiiciency for a given amount of metal.

Another object of this invention 'is to increase the strength of thecore and thereby enable the radiator to resist injury when used for heawork.

A furt er object of this invention is to provide a radiator core havingfew parts which are of simple construction, which are capable of beinemanufactured readily and which can be quickly, easily and accuratelyassembled into their proper relative position without requiringspecially skilled help or elaborate apparatus for this purpose.

In the accompanying drawings Figure 1 is a fragmentary front elevationof a radiator embodying my invention.

Figure 2 is a top plan view of the same.

Figures 3 and 4 are horizontal sections taken on the correspondinglynumbered lines in Fi 1.

Figures 5 and 6 are vertical transverse sections taken on lines 5-5 and6 6 respectively in Fig. 2.

Figures 7 and 8l are vertical longitudinal sections taken on thecorrespondingly numbered lines in Fig. 1.

Figures 9 and 10 are perspective views of one of the water tube wallsand one of the radiating fins.

In the following description, similar char acters of reference indicatelike parts in the several figures of the drawings.

The numeral 20 represents the plurality of vertical water tubes of theradiator core and 2l, the plurality of horizontal air passages arrangedbetween the water tubes.

Each of the water tubes consists of two upright wall strips 22 of sheetmetal which are arranged side by side each strip having its opposltelongitudinal edges bent inwardly tol form offsets 23, which engage withthe corresponding olfsets of the companion wall strip as shown in Fig.3, and are connected therewith by soldering or otherwise so as to form'as shown in Figures `tube wall strip is provided with a plurality ofupright stiifening beads 25 which are bent so as to project inwardly andengage the corresponding sti'enin beads 25 of the companion wall stripof t e respective water tube, 2, 3, 4 and 5, thereby bracing these wallsrelatively to each other and materially strengthening the tube andenabling the same to effectively resist the strains to which the same issubjected.

vEach of the water tube wall strips is also provided between itslongitudinal edges with a plurality of horizontal seat beads 26 whichare bent so as to project inwardly, the base or bottom on the concaveside of these beads being preferably in line and Hush with the outersummits of two corresponding corrugations on the longitudinal edges ofthe respective wall strip, as shown in Figures 1, 4, and 9. These seatbeads on each wall strip are of less depth than the stitl'ening beadsand spaced apart from the corresponding seat beads of the companion wallstrip, as shown in Figs. 3 and 9, fora purpose which will presentlyappear.

The air passages are preferably formed between the several watertubes bya plurality of radiating fins or spacers, veach of which consists of astrip 271 of sheet metal which is bent to form a succession of two setsof loops 270 projecting alternating in opposite directions. 'lhe summitof each loop is preferably pinched closely together to form a narrowdouble thickness edge portion 27 which en' gages with the summits of twocorresponding 100 corrugations o n the longitudinal edges of therespective wall strip and also with the bases or bottoms of the seatbeadsof the respective wall strip, the several edges 27 of the summitson the lin loops, and the surfaces of thc re- 105 spective wall stripwith which they engage being connected by soldering in any suitable orapproved manner so that the several tube wall strips and fin strips arepractically one integralstructure which is very strong and 110 durableand not liable to give way under heavy duty.

The edge portions 27 of the iin loops do not interlock with thesegroovesor channels formed on the wall strips by the longitudinal beads25 but instead bridge the same, as shown in Figs. 4 and 5, whereby themetal of these edges is exposed to the air at these places as shown at40 and a correspondingly greater radiation of heat to the atmospherethan otherwise would occur if these surfaces engaged each other andinterposed a double thickness of metal through which the heat would haveto nass. f y

Each loop of the radiating tin has the central part 28 of its plies orsides bent toward each other so that the loop has substantially.

the form of a keyhole, and this bonding is preferably of angular form,as shown in Figures 1, 5, and 6, so that the radiator core presents acellular appearance. The sides or plies of the loops do not 'engage eachother, thereby fully exposing the plies of each loop on its oppositesides and thereby obtaining the maximum radiating ei'ect.

For the purpose of further increasing the radiation of heat by the ns tothe atmosphere each side or ply of a loop is provided with a pluralityof crosswise slits 29 and the metal between each pair of slits isdeflected so as to form a baille web 30 which extends across the concavesides of the respective loop side, as shown in Figs. 1, 5, and 6, andtherefore presents an obstruction to the air moving t rough the airpassages and causes the latter to take up more of the heat from thewater which is to be cooled.

To permit the webs to thus extend across the air path and still permitof bending the plies of the loop into keyhole form each web is shortenedby crimping the same, this being accomplished by reversely bending apart of the web as shown at 31 and detlecting a part thereof, as shownat 32.

As a whole this core has greater strength and radiating capacit for agiven amount of metal used and cana so be produced expeditiously and atcomparatively low cost.

I claim as my invention:

1. A radiator core containin a plurality of water tubes and a pluralityo air passages arranged between said water tubes, each of said watertubes consisting of two wall strips of sheet metal each of which has itsopposite longitudinal edges offset inwardly and engaging with thecorresponding inwardly oH- set longitudinal edges of the companion wallstrip, and each wall strip being provided intermediate of itslongitudinal oiiset edges with a plurality of longitudinal inwardlydeiiected stiiiening beads and a plurality of transverse inwardlydeflected seat beads, intersecting said longitudinal beads at rightangles, and said air passages being formed by sheet metal radiating nsarranged between adjacent water tubes and engaging with the bases of theseat beads on the walls thereof.

2. A radiator core containing a plurality of water tubes and a pluralityof a1r passages arranged between said water tubes, each of said watertubes consisting of two wall strips of sheet metal each of which has itsopposite longitudinal edges oiiset inwardly and engaging with thecorresponding inwardly oli'- yset longitudinal edges of the companionwall strip, and each wall strip being provided intermediate of itslongitudinal offset edges with a plurality of longitudinal inwardlydeflected stiffening beads and a plurality of transverse inwardlydeiiected-seat beads intersecting said longitudinal beads at rightangles, and said air passages being formed by a sheet metal strip whichis bent to form a succession of two sets of loops projecting alternatelyin opposite directions and the summits of each set of loops engagingwith the bases of the transverse beads on the exterior of one of thewalls of each water tube.

3. A radiator core containing a plurality ,of water tubes and aplurality of air passages arranged between said water tubes, each ofI:said water tubes consisting of two wall strips 'of sheet metal each ofwhich has its opposite longitudinal edges offset inwardly and engagingwith the corresponding inwardly oli'- set longitudinal edges of thecompanion wall strip, and each wall strip being provided intermediate ofits longitudinal oiset edges with a plurality of longitudinal inwardlydelected stifening beads and a plurality of transverse inwardlydeflected seat beads intersecting said longitudinal beads at rightangles, and said air passages being formed by a sheet metal strip whichis bent to form a succession of two sets of loops projecting alternatelyin opposite directions and the sumf mits of each set of loops engagingwith the bases of the transverse beads on the exterior .of one of thewalls of each water tube, each of said loops having the central parts ofits sides bent toward each other so that the loop lis of substantiallykeyhole form.

4. A radiator core containin a plurality of water tubes and a pluralityo air passages arranged between said water tubes each of said Watertubes consisting of two wall strips of sheet metal each of whlch has itsopposite longitudinal edges oiset inwardly and engaging with thecorresponding inwardly oifset longitudinal edges of the companion wallstrip, and each wall strip being provided intermediate of itslongitudinal oiset edges with a plurality of longitudinal inwardly deected stifi'ening beads and a plurality of transverse inwardly deflectedseat beads intersecting said longitudinal beads at right angles, andsaid air passages being formed by :a sheet metal strip which is bent toform a [succession oftwo sets of loops projecting almits of each set ofloops engaging with the bases of the transverse beads on the exterior ofone of the walls of each water tube, and

each of said loops having its summit pinched closely to ether to form arib which forms a narrow e ge for engagin the respective seat on theopposing water tu e wall.

5. A radiator core containing a plurality of water tubes and a pluralityo air passages arranged between said water tubes, each of said watertubes consisting of two wall strips of sheet metal cach of which has itsopposite longitudinal edges offset inwardly and enlgagi ng with thecorresponding inwardly olfset longitudinal edges of the companion wallstrip, and each wall strip being provided intermediate of itslongitudinal offset edges with a plurality of lon itudinal inwardlydeflected stiffcning bea s and a plurality of transverse inwardlydeflected seat beads intersecting said longitudinal beads at rightangles, and said air passages being formed by a sheet metal strip whichis bent to form a succession of two sets of loops projecting alternatelyin opposite directions and the summits of each sct of loops engagingwith these bases of the transverse beads on the eX- terior of one of thewalls of each Water tube, and the sides of said loops being slittedcrosswisc and the metal between each pair of slits deflected to formradiating webs.-

G. A radiator core containing a plurality of water tubes and a pluralityof air passages arranged between said water tubes, each of said watertubes consisting of two wall strips of sheet metal each of which has itsopposite longitudinal edges offset inwardly and engaging with thecorresponding inwardly offset longitudinal edges of the companion wallstrip, and each wall strip being provided intermediate of itslongitudinal offset edges with a plurality of longitudinal inwardlydeflected sti ffening beads and a plurality of transverse inwardlydeflected seat beads intersecting said longitudinal beads at rightangles, and said air passages being formed by a sheet metal strip whichis bent to form a succession of two sets of loops projecting alternatelyin opposite directions and the summits of each set Vof loops engagingwith the bases of the transverse beads on the exterior of one of' thewalls of each water tube, each of said loops having the central parts ofits sid es bent toward each other so that the loop is of substantiallykeyhole form, and each side being slitted crosswise and the metalbetween cach pair of slits deflected to form a radiating web which isarranged across the concave faces of each side.

7. A radiator core containing a plurality ofl water tubes and aplurality of air passages arranged between said water tubes, each ofsaid water tubes consisting of two walls strips of sheet metal each ofwhich has its opposite longitudinal edges o ffset inwardly and engaglngwith the corresponding inwardly ofi'- set longitudinal ed es of thecompanion wall strip, and each wa l strip being provided intermediate ofits longitudinal offset edges with a plurality of longitudinal inwardlydeflected stiffening beads and a plurality of transverse inwardlydeflected seat beads intersecting said longitudinal beads at ri htangles, and said air passages being formedg by a sheet metal strip whichis bent to form a succession of two sets of loops projecting alternatelyin opposite directions and the summits of each set of loops engagingwith these bases of the transverse beads on the exterior of one of thewalls of each water tube, each of said loops having the central parts ofits sides 'bent toward each other so that the loop is substantially ofkeyhole form, and each side being slitted crosswise and the metalbetween each pair of slits deflected to form a radiating web which isarranged across the concave faces of cach side, and each web beingcrimped for adapting the length of the same to the length of therespective side. l

8. A radiator core containing a plurality of Water tubes and a pluralityof' air passages arranged between said water tubes, each of said watertubes consisting of two wall strips of sheet metal each of which has itsopposite longitudinal edges offset inwardly and engaging with thecorresponding inwardly offset longitudinal edges of the companion wallstrip, and each wall strip being provided intermediate of itslongitudinal offset edges with a plurality of longitudinal inwardlydeflected stiffening beads and a plurality of transverse inwardlydeflected seat beads intersecting said longitudinal beads at rightangles, and said air passages being formed by a sheet metal strip whichis bent to form a succession of two sets of loops pro'ecting alternatelyin opposite directions an the summits of each set of' loops engagingwith the bases of the transverse beads on the exterior of one of thewalls of each water tube, and

the offset edges of said wall strips being corrugated and the summits ofsaid corrugations facing the summits of said loops.

9. A radiator core containiner a plurality of water tubes and aplurality of? air passages arranged between said water tubes, each ofsaid water tubes consisting of two wall strips of sheet metal each ofwhich has its opposite longitudinal edges offset inwardly and engagingwith the corresponding inwardly offset longitudinal edges of thecompanion wall strip, and each wall strip being provided intermediate ofits longitudinal offset edges with a plurality of longitudinal inwardlydeflected stiffening beads and a plurality of transverse inwardlydeflected seat beads intersecting said longitudinal beads at rightangles, and said air passages being formed by a sheet metal strip whichis Dent to form a succession of/two sets of loops projecting alternatelyin opposite directions and the summits of each set of loops engagingwith the bases of the transverse beads on the exterior of one of theWalls of eaoli Water tube, and the offset edges of said Wall stripsbeing bent into zigzag form and the summits of said offset edges beingin line with the bases of the corresponding bases of the seat beads onthe respective wall strip and engaging with the opposing 10 summits ofsaid radiating loops.

In testimony whereof I ax my signature.

JOHN M. FEDDERS.

